Xingbo Yang


Contact

Xingbo Yang


Curriculum vitae


xingbo_yang@fas.harvard.edu

Department of Molecular and Cellular Biology and Department of Applied Physics


Harvard University


Northwest Lab Building
52 Oxford Street
Cambridge MA 02138




Xingbo Yang


xingbo_yang@fas.harvard.edu

Department of Molecular and Cellular Biology and Department of Applied Physics


Harvard University


Northwest Lab Building
52 Oxford Street
Cambridge MA 02138



Self-organization of active particles (current)


Active particles are intrinsically out of equilibrium. They dissipate free energy at the individual particle level to exert forces and to move. A collection of active particles interact and display rich self-organization behaviors absent in equilibrium systems. They are good model systems for cytoskeletal remodeling, collective cell migration and animal flocking. 

I investigate how collective behaviors emerge from self-motility and local interactions among active particles. Using a hydrodynamic theory of active particles, I showed that complex pattern formation of bacterial colonies can be explained by the interplay of logistic growth, crowding effect and alignment interaction. Using computer simulations, I discovered spontaneous aggregation and segregation of active particles induced by confinement and steric repulsion. By explicitly coarse-graining a self-propelled particle model with alignment interaction and rotational inertia, I developed a hydrodynamic theory for collectively turning flocks.

While the dynamics of active particle are being extensively studied, the energetic aspect of these systems remain poorly characterized. My future objective is to explore the impact of energy dissipation on self-organization of active particles.

Publications


Spiral and never-settling patterns in active systems


X. Yang, D. Marenduzzo, M. C. Marchetti


Phys. Rev. E, vol. 89(1), American Physical Society, 2014 Jan, p. 012711


Aggregation and segregation of confined active particles.


Xingbo Yang, M. Lisa Manning, M. Cristina Marchetti


Soft Matter, vol. 10(34), 2014 Jul 5, pp. 6477-6484


Hydrodynamics of Turning Flocks


Xingbo Yang, M. Cristina Marchetti


Phys. Rev. Lett., vol. 115(25), American Physical Society, 2015 Dec, p. 258101